HV application for Serial Powered Pixel Module Andreas

HV application for Serial Powered Pixel Module Andreas Eyring, Fabian Hügging Bonn University 24. 02. 2009 Andreas Eyring, Power Distribution, Cern 24. 02. 2009 0

HV effects - Parallel powering present situation : 24. 02. 2009 future situation (after irradiation) : Andreas Eyring, Power Distribution, Cern 24. 02. 2009 1

HV effects - Serial powering Simple option : NO problems One floating HV channel per module occurs NO PROBLEMS HV daisy chain: # of mod. in SP chain • One floating HV channel for one SP chain • all modules connect in parallel to HV and HV return line • Short between 2 modules in the chain via HV return path (~ 20 KΩ) • this option are tested on the Bonn serial powered half stave by Duc Bao Ta et al. 24. 02. 2009 Andreas Eyring, Power Distribution, Cern 24. 02. 2009 2

HV effects - Serial powering Do we need the HV return line ? • One floating HV channel for one SP chain • all modules connected in parallel to the HV line • just one HV return line to one module in the SP chain needed The influence of the sensor grounding over the preamplifier input is NOT clear and This setup has to be tested, esp. after irradiation 24. 02. 2009 Andreas Eyring, Power Distribution, Cern 24. 02. 2009 3

HV effects - simulation Spice simulation: SP on HV part • Hv return line only used for filtering • Reduce # of wires ΔV = 10, 5 m. V • HV source higher current 24. 02. 2009 Additional I = 5, 6 m. A Andreas Eyring, Power Distribution, Cern 24. 02. 2009 4